I have not been keeping up on these new calibers, so I assumed because it said .223 Wylde that I could not shoot .556 through it.
Still haven't looked it up but this is a more powerful round like when they went from .223 Rem to .556?
Magazines and bolts are backwards compatible as well to .556?
I have both .556 and 7.62 now for the XCR.

You're fine....it'll shoot 5.56 or .223 without issue.

"Necessity is the plea for every infringement of human liberty. It is the argument of tyrants; the creed of slaves."-William Pitt the Younger

A friend and I are both seriously looking at this....but I can't help but think: it's still not nearly as nice as an XCR. Ya, it's cheaper....but I can't help but think putting that money towards an XCR-L (especially in my friend's case since he only has an -M) makes more sense.

"Necessity is the plea for every infringement of human liberty. It is the argument of tyrants; the creed of slaves."-William Pitt the Younger